Smart writing instrument or stylus



FIG. 1 is a perspective view of an embodiment of an ornamental design for a smart writing instrument or stylus;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown in the Figures are for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM I claim the ornamental design for smart writing instrument or stylus, as shown and described. 